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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Mechanical System (A25A-FXS) - Service Information (1 Of 6)) >> Engine >> On-Vehicle Inspection [02/2019 - 08/2020] >> Procedure

On-Vehicle Inspection [02/2019 - 08/2020]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. INSPECT ENGINE COOLANT (for Engine) 

    Refer to ON-VEHICLE INSPECTION [02/2019 - ]

  2. INSPECT ENGINE OIL 

    Refer to ON-VEHICLE INSPECTION [02/2019 - 08/2020]

  3. INSPECT AUXILIARY BATTERY 

    Refer to ON-VEHICLE INSPECTION [02/2019 - 10/2019] , or refer to ON-VEHICLE INSPECTION [10/2019 - 08/2020]

  4. INSPECT SPARK PLUG 

    Refer to ON-VEHICLE INSPECTION [02/2019 - 08/2020]

  5. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY 
    1. Remove the air cleaner filter element sub-assembly.
    2. Visually check that the air cleaner filter element sub-assembly is not damaged or excessively oily.

      HINT: 

      • If there is any dirt or clogs in the air cleaner filter element sub-assembly, clean it with compressed air.
      • If any dirt or clogs remain even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.
    3. Install the air cleaner filter element sub-assembly.
  6. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE 
    1. Put the engine in inspection mode.

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

    2. Rev up the engine several times. Check that the engine does not emit unusual noises.
    3. If unusual noises occur, warm up the engine and idle it for 30 minutes or more, then perform the inspection.

      HINT: 

      If any defects or problems are found during the inspection, perform the valve lash adjuster assembly inspection.

      Refer to PROCEDURE - Step 2

  7. INSPECT IGNITION TIMING 
    NOTE:
    • Check the ignition timing with the cooling fan off.
    • Turn off all electrical systems and the A/C.
    • When checking the ignition timing, the transaxle should be in park.
    1. Put the engine in inspection mode.

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

    2. Warm up and stop the engine.
    3. Connect the Techstream to the DLC3.
    4. Put the engine in inspection mode.

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

    5. Enter the following menus: Powertrain / Engine / Data List / Ignition Timing Cylinder #1.

      Powertrain > Engine > Data List 

      Tester Display
      Ignition Timing Cylinder #1

      Standard Ignition Timing

      -2 to 14° BTDC at idle

    6. Check that the ignition timing advances immediately when the engine speed is increased.
    7. Enter the following menus: Powertrain / Engine / Active Test / Activate the TC Terminal / ON.

      Powertrain > Engine > Active Test 

      Active Test Display
      Activate the TC Terminal
      Data List Display
      Ignition Timing Cylinder #1
    8. Monitor Ignition Timing Cylinder #1 of the Data List.

      Standard Ignition Timing

      8 to 12° BTDC at idle

  8. INSPECT ENGINE IDLE SPEED 
    NOTE:
    • Check the ignition timing with the cooling fan off.
    • Turn off all electrical systems and the A/C.
    • When checking the ignition timing, the transaxle should be in park.
    1. Put the engine in inspection mode.

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

    2. Warm up and stop the engine.
    3. Put the engine in inspection mode.

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

    4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.

      Powertrain > Engine > Data List 

      Tester Display
      Engine Speed
    5. Read the value displayed on the Techstream.

      Standard Idle Speed

      1050 to 1150 rpm

  9. INSPECT COMPRESSION 
    NOTE:

    Keep the spark plug holes free of foreign matter when measuring the compression pressure.

    1. Put the engine in inspection mode.

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

    2. Warm up and stop the engine.
    3. Check for DTCs.
    4. Remove the No. 1 engine cover sub-assembly.

      Refer to PROCEDURE - Step 26 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 26 [10/2019 - 08/2020]

    5. Remove the front fender front splash shield LH.

      Refer to PROCEDURE - Step 13 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 13 [10/2019 - 08/2020]

    6. Remove the front fender front splash shield RH.

      Refer to PROCEDURE - Step 14 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 14 [10/2019 - 08/2020]

    7. Remove the No. 1 engine under cover.

      Refer to PROCEDURE - Step 15 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 15 [10/2019 - 08/2020]

    8. Remove the No. 2 engine under cover assembly.

      Refer to PROCEDURE - Step 16 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 16 [10/2019 - 08/2020]

    9. Remove the 4 spark plugs.

      Refer to REMOVAL [02/2019 - 08/2020]

      NOTE:

      DTCs will be stored if the inspection is performed with the ignition coil assembly connectors disconnected. Make sure that the ignition coil assembly connectors are connected during the inspection.

    10. Disconnect the fuel injector connector (for Port Injection).
      GTY847958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Detach the claw and raise the lock lever to disconnect the fuel injector connector (for Direct Injection) as shown in the illustration.
      GTY933557Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lock Lever
    12. Remove the inlet air cleaner assembly.

      Refer to PROCEDURE - Step 3

    13. Remove the air cleaner assembly with air cleaner hose.

      Refer to PROCEDURE - Step 4

    14. Using an 8 mm socket wrench, remove the 3 bolts to disconnect the throttle body assembly from the intake manifold.
      GTY857601Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    15. Remove the throttle body gasket from the intake manifold.
      GTY868401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    16. Check the cylinder compression pressure.
      GTY847961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Insert a compression gauge into the spark plug hole.
      2. Connect the Techstream to the DLC3.
      3. Turn the power switch on (IG).
      4. Turn the Techstream on.
        NOTE:

        Check the HV battery voltage in the Data List to ensure that the battery is fully charged.

      5. Enter the following menus: Powertrain / Hybrid Control / Active Test / Compression Test / ON.

        Powertrain > Hybrid Control > Active Test 

        Tester Display
        Compression Test
      6. Depress and hold the brake pedal, and turn the power switch on (READY). Then check the compression pressure.

        Standard Compression Pressure

        870 kPa (8.9 kgf/cm 2 , 126 psi)

        Minimum Compression Pressure

        700 kPa (7.1 kgf/cm 2 , 102 psi)

        Pressure Difference between Each Cylinder

        200 kPa (2.0 kgf/cm 2 , 29 psi) or less

        NOTE:
        • Noise may be emitted from the hybrid vehicle transaxle assembly. However, this is not a malfunction.
        • Inspect all cylinders in the same way.
        • Measure the compression pressure as quickly as possible.
      7. If the cylinder compression pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect it again.

        HINT: 

        • If adding oil increases the compression pressure, the piston rings and/or cylinder bore may be worn or damaged.
        • If the compression pressure stays low, a valve may be stuck or seated improperly, or there may be leaks in the cylinder head gasket.
    17. Install a new throttle body gasket to the intake manifold with the protrusions of the throttle body gasket oriented as shown in the illustration.
      GTY853543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion
    18. Using an 8 mm socket wrench, connect the throttle body assembly to the intake manifold with the 3 bolts.

      Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

    19. Install the air cleaner assembly with air cleaner hose.

      Refer to PROCEDURE - Step 2

    20. Install the inlet air cleaner assembly.

      Refer to PROCEDURE - Step 3

    21. Connect the fuel injector connector (for Direct Injection) and push down the lock lever to attach the claw as shown in the illustration.
      GTY890151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lock Lever
    22. Connect the fuel injector connector (for Port Injection).
      GTY847958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    23. Install the 4 spark plugs.

      Refer to INSTALLATION [02/2019 - 08/2020]

    24. Install the No. 2 engine under cover assembly.

      Refer to PROCEDURE - Step 65

    25. Install the No. 1 engine under cover.

      Refer to PROCEDURE - Step 66

    26. Install the front fender front splash shield RH.

      Refer to PROCEDURE - Step 68

    27. Install the front fender front splash shield LH.

      Refer to PROCEDURE - Step 67

    28. Install the No. 1 engine cover sub-assembly.

      Refer to PROCEDURE - Step 58

    29. Clear the DTCs.
      NOTE:

      After performing the inspection, clear the DTCs and confirm that DTCs are not stored again or that the normal system code is output if using a check wire.

  10. INSPECT CO/HC 

    HINT: 

    This check determines whether or not the idle CO/HC complies with regulations.

    1. Put the engine in inspection mode.

      Refer to INSPECTION MODE PROCEDURE [11/2018 - ]

    2. Run the engine speed at 2500 rpm for approximately 180 seconds.
    3. Insert a CO/HC meter testing probe at least 40 cm (1.31 ft.) into the tailpipe during idle.
    4. Immediately check the CO/HC concentration at idle and then at an engine speed of 2500 rpm.

      HINT: 

      When performing a 2 mode test (with the engine idling/running at 2500 rpm), the measurement procedures are determined by applicable local regulations.

      If the CO/HC concentration does not comply with the regulations, perform troubleshooting in the order given below.

      1. Check for DTCs.
      2. See the following table for possible causes, then inspect the applicable parts and repair them if necessary.
        CO HC Problem Cause
        Normal High Rough idle
        1. Faulty ignition:
          • Incorrect valve timing
          • Fouled, shorted or improperly gapped spark plugs
        2. Incorrect valve clearance (valve lash adjuster assembly)
        3. Leaks in intake or exhaust valves
        4. Leaks in cylinders
        5. Faulty EGR
        Low High Rough idle (Fluctuating HC reading)
        1. Vacuum leaks:
          • PCV hoses
          • Intake manifold
          • Throttle body with motor assembly
        2. Lean mixture causing misfire
        3. Faulty EGR
        High High Rough idle (Black smoke from exhaust)
        1. Restricted air cleaner filter element sub-assembly
        2. Plugged PCV valve
        3. Faulty SFI systems:
          • Fuel pressure regulator assembly
          • Engine coolant temperature sensor
          • Mass air flow meter sub-assembly
          • ECM
          • Fuel injector assemblies
          • Throttle position sensor (built into throttle body with motor assembly)
        4. Faulty EGR
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